your reliable partner - mayr · pdf fileyour reliable partner roba®-es for smooth running...

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your reliable partner
ROBA-ES
K.940.V15.EN

We safeguard the movements of this world
Specialists for power transmission for more than a century
The Christian Mayr mill-construction business founded in 1897.
mayr power transmission is one of the most traditional and yet most innovative German companies in the field of power transmission. From modest beginnings in the year 1897, the family enterprise from the Allgu region has developed into world market leader. Today, 600 employees work at the headquarters in Mauerstetten; more than 1000 employees work for the company worldwide.
Unsurpassed standard product rangemayr power transmission offers an extensive variety of torque limiters, safety brakes, backlash-free shaft misalign-ment compensation couplings and high-quality DC drives. Also when it comes to customer-specific requirements, the company possesses the expertise to develop customized and economical solutions. This is why numerous renowned machine manufacturers trust in holistic solutions by mayr power transmission.
Represented worldwideWith eight subsidiaries in Germany, sales offices in the USA, France, Great Britain, Italy, Singapore and Switzerland as well as 36 additional country representatives, mayr is available in all important industrial areas, guaranteeing optimum customer service around the globe.
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Tradition and innovation the best of both worlds
Tradition and innovation do not contradict each other - on the contrary. They are the two supporting pillars which have guaranteed stability and reliability for generations. Long-term stability, independence as well as a good reputation and satisfied customers are important values for a family enterprise rich in tradition.
Therefore, we place emphasis on:
Tested product quality,
Optimum customer service,
Comprehensive know-how,
Global presence,
Successful innovations and
Effective cost management.
Following our own objective of always offering our customers the technologically most advanced and most economical solution, we have been able to gain the trust of many leading industrial companies from all branches and from all over the world as a reliable partner.
Place your trust in our know-how and our more than 50 years of experience in the areas of torque limiters, safety brakes and shaft couplings.
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ROBA-ESBacklash-free elastomer coupling
ROBA-ES Elastomeric ElementsThe elastomeric elements are the central element of the ROBA-ES-coupling. They define the application range as well as the shaft connection behaviour via the permitted torque, the rigidity, the damping and the misalignment values.
By using a unique polyurethane material and a special injection procedure, it is possible to achieve a high dimensional accuracy and evenness in the teeth of the elastomeric element.
The elastomeric elements are available in different shore hardnesses. The teeth of the elastomeric element are chamfered at the sides. This makes blind assembly easier.The ambient temperatures present during operation have a consi-derable effect on the dimensioning of a ROBA-ES-coupling (see Dimensioning page 22). Agent Resistance
The elastomeric elements are very resistant against pure mineral oils (lubricating oils) and anhydrous greases.They have a similar resistance against fuels such as regular-grade petroleum diesel oil kerosene. Damage may occur after longer exposure to alcohols or aromatic fuels (super/four star petrol).
The elastomeric element material used is resistant to hydrolysis. In contrast to other polyurethane materials, water (including sea water) causes, even after years of exposure, no particular changes to the mechanical characteristics. Hot water, however, reduces the mechanical strength.
DimensioningThe characteristics of ROBA-ES couplings can be greatly varied by using different elastomeric elements. Due to different damping characteristics and the non-linear rigidity of the elastomer, this element also offers more parameters than the steel shaft connection, which should be taken into account on selection.
We therefore recommend careful, thorough coupling dimensioning (see Dimensioning page 22).
Vibration damping
Damping behaviour can be selected through elastomeric elements in different Shore hardnesses
Backlash-free torque transmission through pre-tensioned elastomeric element
Compensation of shaft misalignments
Plug-in connection, therefore suitable for blind assembly
Maintenance-free, media-resistant, temperature-stable
Torsionally flexible on a small scale, but two to four times more rigid than toothed belt drives
ROBA-ES couplings are also available in ATEX design according to the directive 2014/34/EU.
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ROBA-ES Contents
Designs
ROBA-ES with key hubs ROBA-ES couplings are delivered as un-bored hub design (further processing to be carried out customer-side) or with a fi nish bore and keyway JS9 (DIN 6885/1). An adjusting screw is located in the hub for axial securement.
Up to Size 38, the hubs are made of aluminium. From Size 42, they are made of steel.
Conventional bores can be delivered from stock.
Single-jointed coupling
Double-jointed coupling short
Double-jointed coupling with sleeve
Page 8
ROBA-ES with clamping hubs ROBA-ES couplings with clamping hubs are conceived for fast and safe installation or de-installation. They have no keyway. The tightening torque (TA) on the clamping screws must be maintained in order to ensure reliable, frictionally-locking torque transmission.
Please observe the maximum permitted torques (page 28).
Up to Size 38, the hubs are made of aluminium. From Size 42, they are made of steel.
The clamping hub can be designed with an additional keyway on request.
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ROBA-ES with clamping hubs Compact
ROBA-ES couplings with clamping hubs are conceived for fast and safe installation or de-installation. They have no keyway. The tightening torque (TA) on the clamping screws must be maintained in order to ensure reliable, frictionally-locking torque transmission.
The hubs are made of aluminium. The clamping hub can be designed with an additional keyway on request.
Due to the compact construction of the short clamping hubs, the couplings can be used in constricted installa-tion conditions
Page 12
ROBA-ES with split clamping hubs ROBA-ES couplings with split clamping hubs are conceived for fast and safe installation or de-installation. Due to the orientation of the half-shells in the same direc-tion, radial assembly/disassembly of the coupling is pos-sible at stationary shaft ends. The tightening torque (TA) on the clamping screws must be maintained in order to ensure reliable, frictionally-locking torque transmission.
Up to Size 38, the hubs are made of aluminium. From Size 42, they are made of steel. The split clamping hub can be designed with an additional keyway on request.
Page 14
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ROBA-ES with steel shrink disk hubs
On this design, the hub body is made of steel (oiled) and the ring of phosphated, annealed steel. This design is available in a standard variant and a variant according to DIN 69002. The DIN variant has an elastomeric element with a central, standardised bore and standardised bore diameters in the hubs. The DIN variant is conceived for use in short bore spindles and multi-spindle heads. Because of the steel hubs, this DIN design combines robustness with precision. This design should be selected in preference to others, in particular on applications with heavily pulsating or alternating loads. Please observe the maximum permitted torques (page 27).
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ROBA-ES with Expansion hub and Clamping hub
ROBA-ES couplings with an expansion hub have been designed for frictionally-locking torque transmission onto hollow shafts. The expansion hubs are combined with clamping hubs on the opposite side as a standard measure. Other combinations with other hubs are conceivable.
The stated diameters of the expansion hubs are preferred dimensions.
Other diameters can be requested at mayr power transmission.
Page 20
Coupling Dimensioning Page 22
Technical Explanations Page 24
Technical Explanations (transmittable torques) Page 27
ROBA-ES with aluminium shrink disk hubs
On this design, the hub body is made of aluminium and the ring of phosphated, annealed steel. The design is constructionally identical to the P-design (page 19). The symmetry, the absence of keyways and radial bores pro-duces an optimum shaft run-out. Therefore, much higher speeds are possible compared to the other hub designs (please observe Diagram 1 Balancing the shrink disk hub, page 31).
The torque is transmitted via frictional locking onto the shaft. Please observe the maximum permitted torques (page 27).
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your reliable partner - mayr · pdf fileyour reliable partner roba®-es for smooth running...

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